Device for stropping double-edged safety-razors.



F. MITCHELL.

DEVIGE FOR STROPPING DOUBLE EDGEI) SAFETY BAZOBS.

APPLICATION IILED AUG. 18,1908.

Patented July 20, 1909.

2 SKEETS-BHEET 1.

, .F. MITCHELL. DEVICE FOR STBOPPING DOUBLE EDGED SAFETY BAZOBS.

APPLIUA TIOIIIILED AUG. 18,1908.

Patented mylzo, 19 9.

z sums-sun's 2.

urnrnn sirntrns FATENT; o rroE.

" FRANK nrrcnELL, or LONDON, ENGLAND.

DE ICE FOR momma noUBLE-Enem) sAFE'rY-RAzons.

5 new and useful I111 )rovements in Devices for Stropping Double-*dged safetyfiazors, of

wh ch the following is a SPGGifiGzttiOllr f This invention relates to improvements in, devices for stropping double-edged safety e razors and belongs to the type of machine 111 which a reciprocating flexible strep passes over a roller operatively connected with a pivoted blade-holder so that as the flexible strep is reciprocated, the two-faces of a cutt'ng edge are alternately brought into contact with the strop.

- One object oft-his invention is to enable a double-edged blade to bestrop ied on both edges at the one operation an( subsidiary objects are to enable the blade holder to be locked in a safe position when thestrop is not in use, to insure that" the blade-holder shall be in its proper initial relationto the strop before beginning a stropping operation, also so thatthe edges shall. be guarded by rollers orba-rs, and to enable the strop to be held up.

to its Work when in use. i A device forstropping double-edged razor blades according to this invention comprises gitndinal axis in said frame and adapted to gri a double-edged blade 1n the middle so as to" eave the two cutting edges exposed. a,

rolleis rotatablyjo'nrnaled in said frame parallel with the bladedrolder,means for trans mittingpartial rotation from the roller to the blade support, .aflexible strop' doubled over the roller 'and arranged to contact with both faces of-gthe support, a gate hinged to the frame and [cooperating with t e frame to hold thestrop in contact with the blade-suport on both sides and means for causing one ace ofeach cuttingedge to-be stropped at each movement of the strep; a In the accompanying drawings, Figure lis fqie'rspectivefview' of one form of stropping device embodying certain features of this invention as in use; Fig. 2 is a perspective view oftheisaine mechanism opened out with the sectionon'the line 33 of 1; Fig, 4 is a transversesect-ion of another form of stropping device embodying this invention :Fig. 5 asaaside' elevation of the sa1ne; Fig. dis an '5 j1'endelevation, and Fig. 7 is a horizontal sec' tionion'theline 7 7 of Figs. 4, 5 and 6..

, Specification of Letters Patent; Application med Aiigust 18, 1908. Serial No. 449,033.

a frame, a blade-support j ournalcd on its lon side the transverse bars Dd).

stropand Jrazorblade' ren'ioved; li"ig.f3 is a Patented Ju1 '2o,190e.-

- Referring to Figs 1, 2 and 3, the main frame is in the form of a yoke having a transverse member A and two sides A and A Btween the two sides of the frame is journaled a blade-holder consisting of two plates, one plate B having journals or pivot'pins B ."at' its ends and having projections B to engage the holes in a thin blade, and a second plate 0 hinged at one end as at C to the first plate B and having holes C arranged to en gage the pins B Between the two sides A A of the frame are fixed two transverse bars 1) D parallel to the blade-holder and in proximity tothe edges of the blade, 50' that when the blade-holder is in a central posi-' tion, the edges of the razor will be completely guarded by the transverse bars D D. J ournaled hctweenthe side plates A A and parallel to the blade-support B is a' roller E which carries a radial arm F lmving a toothed segment F" arranged to engage another toothed segment B connected to the bladesuppcrt B, so that as the roller E rotates to and fro, the blade-support B is tilted to and fro in a direction opposite to the rotation of the roller. A flexible stro 3 G is passed over the roller E and brought own with its ends close together so'that the strep lies in pr0x imity to the blade-holder on both sides. In the arrangement shownthe strep passes in Hinged at H to themain frame is a gate or second frame consisting of" twoside plates H H connected by transversebars J J -so arranged that when the gate is folded down on to the main frame,

the bars J J coining opposite the bars D D hoid the .strop iii-proximity to the bladeholdcr on both sides. .At the free ends of the 11111811 H is pivoted a locking member K controlledby' a leafspring K and havin at its cnds'pins K adapted to engage with slots L in theends of the plates A A of the main frame, the arrangement being such that when the gate is pressed into contact with the main frame the pins K ride over into the slots L and lock the mechanism in operative position,,while to open the mechanism, it is only necessary to press the K, so as to lift the pins K out of'theslots L against the action ot-thespring-KRI Hooks M pivoted to the yoke A, serve to connect the pivoted member mechanism to a rail .or' other fixed projection. "lhe"arrangement such that when a. '1

- -10 he plates B andC and the mechanism .is closed,the strop is held close tothe bladedonble 'edged razorblade' is inserted be tweent Stro is ulled to and fro bymeans of the protecting from the blade-support so-that member consistingof a C-piece R. The

' that the b ads is equally distant between the two parts of the strop and is therefore in to secure by Letters Patent is support as shown in and when the,

hen les theblade-sup ort. is alternately tilted from side to side so t at at each movement of the strop one face of each cutting edge of the razor is 0 erated upon, thus in the position shown in igQ 3 the right hand of the strop being pulled the right hand face of the lower cutting edge and the left-hand face of the upper cutting edge are both being stropped simultaneously, while on the reversa of the movement of the strop the other two faces of the cutting edges are strop ed.

Referring to Figs. 4 to 7, the main frame is in the form'of a yoke N. Between the two sides of the frame is j ournaled a blade-holder oonsisting of two plates B and C, one plate B having journals or pivot pins B at its ends and having projections B to engage the holes in 'a thin blade, and a second plate C hinged at one end to the first plate B and having holes arranged to engage the pins B Between the two sides of the frame are fixed two transverse bars N N parallel to the b1ade-holder and in proximity to the edges of the blade so that when the blade-holder is in a central position the edges of,the razor will be completely guarded by the transverse bars N N Journaled between the side plates and parallel to the blade-support is a roller 0 which carries the radial arm 0 the edge of which-is slotted to engage a pin P as t 1e roller rotates to and fro the blade-support is tilted to and fro in a direction opposite to the rotation of the roller. Hinged in the frame Nlaretwo gates Q which may consist of coveri'plates, wire frames or the like, and when the strop G position the gates are folded down over it and can be secured in position soas to retainthe strop close u' '-to the blade on each side. On each side p ate of the mainframe N- is arranged a sliding roller 0 is'cut away atits ends at 0 so that when the sliding member R is pushed up to the roller it engages the cut away portions and locks the roller against rotation. The connection between the roller and the bladeholder is such that when the roller is locked, the blade-holder is held in a central position so that the edges of the blade are completely guarded b the transverse bars N N 2 and so proper initial relation to the strop. 'Convemently the sliding members are arranged to en age lugs Q on the gates Q so thatwhen the evice 'is in use, the sliding member serves to lock the gates in position and retain the strip in close proximity to the blade.

What I claim as my invention and desire I. In a device for stropping double-edged support, a flexible strop doubled over the roller and extending across opposite sides of the support in position for simultaneously stropping both edges of the blade, and means hinged to and cooperating with the frame to hold the strop in contact with the blade-support on both sides. I

2., In a device for stropping double-edged razor-blades, the combination of a frame, a blade-support journaled on its longitudinal axis in said frame and adapted to grip a double-edged blade in the middle so as to leave the two cutting edges exposed, a roller rotatably journaled in said frame parallel with the blade-holder, means for transmitting partial rotation from the roller to the bladesupport, bars in the frame parallel with and close'to the blade-holder .to guard the edges of the blade, a flexible strop doubled over the roller and extending across opposite sides of the support in position for simultaneously stropping both edges of the blade, and means hinged 'to and cooperating with the frame to hold the strop in contact with the blade-support on both sides.

3. In a device for stropping double-edged razor blades, thecombination of a frame, a blade-support journaled on its longitudinal axis in said frame and adapted to grip a double-edged blade in the middle so as to leave the two cutting edges exposed, a roller rotatably journaled in said frame parallel with the blade-holder, means for transmit .ting partial rotation from the roller to the blade-su port, bars in the frame parallel with and close to the blade-holder to guard the edges of the blade, a flexible strOpdoubled over-the roller and extending across opposite sides of the support in position for si- 'multaneously stropping both, edges of the blade, means hinged to and cooperatingwith the frame to hold the strop in contact with the blade-support on both sides, and a locking member to hold the device together while in use.- v

4. In a device for stropping LIOLIbIQ QQIgGd razor blades, the combination of a frame, a blade-support journaled on its longitudinal axis insaid frame and adapted to'grip a double-edged blade in the middle to leave the two cutting edges exposed, a roller rotatably journaled in said frame parallel with the blade-holder, means for transmitting, partial rotation from the roller the blade-s11 port, bars in the frame parallel with anc close to the blade-holder to "guard the edges of the blade, a flexible strog douparts of the bled over the roller and extending across opposite sides of the support in position for simultaneously stropping both edges of the blade, means hinged to and cooperating with the -frame to hold the strop in contact with the blade-sup ort on both sides, a lockingmember to ho d the parts of the device toether while in use, and hooks on the frame y which the device 'is suspended.

5. In a device for stro'pping double-edged razor blades, the combinationof a frame, a blade-support ournaled on its long tudinal axis in said frame and adapted to grip a 1 double-edged blade in the middle so as to leave the two cutting edges exposed, a' roller rotatably .journaled in said frame par;

allel with the blade-holder, means for trans mit-ting partial rotation from the roller to the blade-support, a flexible strop doubled over the roller and arranged to contact with both faces of the support, means hinged to and cooperating with the frame to hold the strop'in contact with the blade support on both sides and a sliding member 011 the A frame arranged to engage and lock the roller and to holdthe blade out of engagement with the strep.

6. in a device for stropping double-edged. razor blades, the combination of a frame, a blade-support journaled on its longitudinal axis in said frame and adaptedto grip a double-edged bladein the middle so as to leave the two cutting edges exposed, a roller rotatably journaled in said frame parallel with the blade-holder, means for transmitting partial rotation. from the roller to the blade-support, a flexible strop doubled over the roller and arranged to contact with both faces of the support, two gates hinged to the frame and cooperating with the frame to hold the strop in contact with the bladesupport on both sides, sliding pieces on the frame arranged to hold the retaining gates in position when the device is in use and arranged to lock the roller and hold the blade-- 

